Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 37.42 5.20 97.41 0.10 07Nov2017 9 a.m. 37.06 5.80 97.19 22.10 07Nov2017 10 a.m. 37.62 5.30 92.33 54.40 07Nov2017 11 a.m. 38.05 4.20 88.69 82.60 07Nov2017 12 p.m. 38.88 4.10 84.66 124.20 07Nov2017 1 p.m. 40.82 5.20 76.89 207.70 07Nov2017 2 p.m. 41.77 4.90 73.67 196.20 07Nov2017 3 p.m. 41.77 4.10 72.78 101.20 07Nov2017 4 p.m. 41.27 4.10 72.47 64.70 07Nov2017 5 p.m. 41.02 7.70 75.56 7.40 07Nov2017 6 p.m. 40.64 5.90 69.60 0.00 07Nov2017 7 p.m. 41.83 1.50 63.69 0.00 07Nov2017 8 p.m. 40.69 4.50 68.04 0.00 07Nov2017 9 p.m. 40.87 6.70 67.25 0.00 07Nov2017 10 p.m. 40.95 9.70 65.75 0.00 07Nov2017 11 p.m. 40.78 11.40 63.99 0.00 08Nov2017 12 a.m. 40.33 11.60 62.90 0.00 08Nov2017 1 a.m. 39.54 7.00 63.76 0.00 08Nov2017 2 a.m. 37.24 3.20 66.76 0.00 08Nov2017 3 a.m. 36.16 3.60 68.35 0.00 08Nov2017 4 a.m. 35.33 4.70 68.39 0.00 08Nov2017 5 a.m. 34.95 5.30 69.49 0.00 08Nov2017 6 a.m. 34.21 3.90 71.33 0.00 08Nov2017 7 a.m. 33.37 8.90 73.43 0.00 Accuml. Values 932.57 138.50 1774.38 860.60 Num. Valid Values 24 24 24 24 Avg. Values 38.86 5.77 73.93 35.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.81 222.85 73.93 73.99 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2607 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.3822 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.4623 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5377 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3484 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 2.0914 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.0410 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.037 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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